Linux - Unable to set Blender to correct PULSEAUDIO Device
I resolved the issue by updating from 2.76 to 2.78 RC1 using the following 3 commands:
sudo add-apt-repository ppa:thomas-schiex/blender
sudo apt-get update
sudo apt-get install blender

This added SDL as an option under User Preferences > System > Audio.
I was then able to select the correct audio device in PulseAudio Volume Control (pavucontrol).

Cheers!